Lighting device



FIG. 1 is a perspective view of the lighting device in accordance with our new design;

FIG. 2 is a front side view thereof, the right side, left side and rear side views being identical to the front side view; and,

FIG. 3 is a bottom view thereof.

The broken line forming a square around the claimed design is included for the purpose of illustrating environmental structure and forms no part of the claimed design.

The broken line forming a circular region within the claimed design defines the bounds of the claimed design and forms no part thereof. 

The ornamental design for a lighting device, as shown and described. 